package com.atguigu.flink.chapter11;

import com.atguigu.flink.bean.WaterSensor;
import org.apache.flink.api.common.eventtime.SerializableTimestampAssigner;
import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.Table;
import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;

import java.time.Duration;

import static org.apache.flink.table.api.Expressions.$;

/**
 * @Author lizhenchao@atguigu.cn
 * @Date 2021/2/1 8:54
 */
public class Flink09_SQL_EventTime {
    public static void main(String[] args) {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        env.setParallelism(1);

        SingleOutputStreamOperator<WaterSensor> waterSensorStream = env
            .fromElements(new WaterSensor("sensor_1", 1000L, 10),
                          new WaterSensor("sensor_1", 2000L, 20),
                          new WaterSensor("sensor_2", 3000L, 30),
                          new WaterSensor("sensor_1", 4000L, 40),
                          new WaterSensor("sensor_1", 5000L, 50),
                          new WaterSensor("sensor_2", 6000L, 60))
            .assignTimestampsAndWatermarks(WatermarkStrategy
                                               .<WaterSensor>forBoundedOutOfOrderness(Duration.ofSeconds(5))
                                               .withTimestampAssigner(new SerializableTimestampAssigner<WaterSensor>() {
                                                   @Override
                                                   public long extractTimestamp(WaterSensor element, long recordTimestamp) {
                                                       return element.getTs();
                                                   }
                                               })
            );

        // 1. 创建表的执行环境
        StreamTableEnvironment tableEnv = StreamTableEnvironment.create(env);
        // eventtime把原有的字段标记为事件时间
//        Table table = tableEnv.fromDataStream(waterSensorStream, $("id"), $("ts").rowtime(), $("vc"));
        Table table = tableEnv.fromDataStream(waterSensorStream, $("id"), $("ts"), $("vc"), $("et").rowtime());
        table.execute().print();
    }
}
